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對于鈑金加工怎么表面處理?

發(fā)布日期:2019-06-24 13:20:31 作者:admin 點(diǎn)擊:1325


鈑金加工的工序表面處理對表面所起的裝飾及防護作用被認可。在鈑金加工行業(yè)中,通常采用的表面處理方式有電鍍、噴涂及其它的一些表處方式。對于鈑金加工怎么表面處理?

電化學(xué)處理都應在零件狀態(tài)下進(jìn)行,因為處理過(guò)程中的化學(xué)溶液會(huì )被截留在組合件的縫隙之中而引起腐蝕。

點(diǎn)焊的零件可進(jìn)行化學(xué)處理,但不能進(jìn)行電化學(xué)處理。鋁合金鑄件不能進(jìn)行硫酸陽(yáng)極氧化處理。

細而長(cháng)的管形零件一般不宜進(jìn)行電化學(xué)處理,因為其內表面將沒(méi)有膜層。有較深凹槽或細孔的零件電鍍后,其內表面將不能覆蓋鍍層。

鋼鐵件噴涂前先進(jìn)行磷化處理,以增加涂層的附著(zhù)力。鍍亮鎳的鋼件為提高其耐蝕性,可先鍍銅或鍍暗鎳打底。

鋅基合金一般采用電鍍層作防護裝飾,為提高其鍍層的結合力,一般需先預鍍銅或鎳。對有鉚接要求的電鍍件,其加工工序要是先電鍍,然后再鉚接。

 

 


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